Not always — sometimes they don't (2014), but sometimes they do(2013: http://www.zdnet.com/article/wwdc-2013-announcement-recap-mavericks-ios-7-itunes-radio-and

Not always — sometimes they don't (2014), but sometimes they do(2013: http://www.zdnet.com/article/wwdc-2013-announcement-recap-mavericks-ios-7-itunes-radio-and-new-macs/ http://www.zdnet.com/article/wwdc-2013-announcement-recap-ma...)